REAGENT or RESOURCE	SOURCE	IDENTIFIER
Antibodies
Anti-Ki67	Abcam	Cat.# Ab15580
Anti-PCNA	Cell Signaling Technology	Cat.# 2586S
Anti-Lysozyme	Abcam	Cat.# ab108508
FITC labeled anti-BrdU	Abcam	Cat.# Ab74545
Anti-Mucin 2	Santa Cruz Biotechnology	Cat.# H-300
Anti-GLP1	Abcam	Cat.# Ab22625
Alexa Fluor 488 Goat Anti-Rabbit IgG	Invitrogen	Cat.# A11008
Chemicals, Peptides, and Recombinant Proteins
D-(+)-GLUCOSE	Sigma-Aldrich	Cat.# G8270-1KG
Insulin	Sigma-Aldrich	Cat.# 12643-25MG
Oil red O	Sigma-Aldrich	Cat.# O0625-100G
Sodium acetate	Sigma-Aldrich	Cat.# S2889-250G
Sodium butyrate	Sigma-Aldrich	Cat.# 303410-100G
Sodium propionate	Sigma-Aldrich	Cat.# P1880-500G
Ampicillin	Sigma-Aldrich	Cat.# A9518-100G
Vancomycin	Sigma-Aldrich	Cat.# V2002-250MG
Neomycin	Sigma-Aldrich	Cat.# N1876-100G
Metronidazole	Sigma-Aldrich	Cat.# M1547-25G
Critical Commercial Assays
Free Fatty Acid Assay Kit	Abcam	Cat.# Ab65341
Triglycerides Reagent	Thermo Scientific	Lot. # 723341
Cholesterol Reagent	Thermo Scientific	Lot. # 848958
IL-22 ELISA Kit	R&D Systems	Cat.# DY582
One-Step RT–PCR Kit with SYBR Green	Bio-Rad	Cat. # 172-5151
QIAamp DNA Stool Mini Kit	Qiagen	Cat.# 51504
QuantiFast SYBR Green PCR kit	Bio-Rad	Cat.# 204054
Experimental Models: Organisms/Strains
Mice: C57BL/6	The Jackson Laboratory	Cat. # 000664
Mice: Rag1 knockout	The Jackson Laboratory	Cat. # 002216
Mice: GPR43 knockout	The Jackson Laboratory	Cat. # 027241
Mice: Rag2−/−IL2rg−/−	The Jackson Laboratory	Cat. # 014593
Mice: IL-22 knockout	Genentech, Inc	NA
Mice: Swiss-Webster mice	Charles River Laboratories	Cat. # 024
Oligonucleotides
See Figure S2	This study
Software and Algorithms
GraphPad Prism	GraphPad Software	NA
Image J	NIH	NA
Other
halloidin–Tetramethylrhodamine B isothiocyanate	Sigma-Aldrich	Cat.# P1951-.1MG
β-acid	S.S. Steiner, Inc	NA
DAPI Fluoromount-G® Mounting Medium	SouthernBiotech	Cat.# 0100-20
Rodent chow	LabDiet	Cat. # 5001
Standard high-fat diet	Research Diets, Inc.	Cat. # D12492
Inulin-enriched high-fat diet	Research Diets, Inc.	Cat. # D13081106
Cellulose-enriched high-fat diet	Research Diets, Inc.	Cat. # D13081107